That is correct understanding but unfortunately the outcome does not work. If you wanted to try it, you could download demo version of AccuTrans.

In AccuTrans the object needs to have 1 shell only to print correctly. Merged or joined Imagine objects have two or more shells - as a result they show incorrectly in printer software.

However, I am currently evaluating FreeCAD which some have said is awkward to use. I am not that far yet to say anything about that but at least it seems to be able to merge objects that have one shell only in AccuTrans. Thus objects exported from FreeCAD should print correctly.

I will test some more with Imagine objects to see if they merge in FreeCAD to produce printable items.